Fastener



FIG. 1 is a top perspective view of a fastener;

FIG. 2 is a front elevation view thereof, the rear elevation view being a mirror image of the front elevation view;

FIG. 3 is a right elevation view thereof, the left elevation view being a mirror image of the right elevation view;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

Stippling is provided on surfaces of the fastener to show surface shading. The stippling does not represent surface texturing, and the fastener invention is not limited to any particular texture.

The broken line showing of the fastener is for the purpose of illustrating portions of the fastener and forms no part of the claimed design. 

CLAIM The ornamental design for a fastener, as shown and described. 